Remove trailing whitespace in .travis.yml from Pkg.Generate()
Merge pull request #6251 from ivarne/whitespace

Remove trailing whitespace in .travis.yml from Pkg.generate()
Doc: Integer promotions to native word size

Make the text here a little more precise about using native machine sizes for integer promotions. Also swap the order with floating point so the easier case is described first.
Merge pull request #6254 from mbauman/patch-1

Doc: Integer promotions to native word size
Windows CI using AppVeyor

New configuration file appveyor.yml
- Downloads and installs latest Julia binary, uses it for dependency libraries
- Also uses MSYS from bundled Git installation

Build script contrib/windows/msys_build.sh
- Downloads MinGW, LLVM, make, etc
- Sets up Make.user to use as many downloaded dependencies as possible
Use msys with a different mingw build, cleaner method for silent downloads

Clean up the MSVC side of the build script
Rehost cut-down MSVC LLVM binary

Stop rebuilding random thanks to Julia nighly update